Yamaha F225 Outboard Rebuild | Yamaha F225 Powerhead Rebuild | Boats.net

Buy the parts used on our Yamaha F225 outboard rebuild here: bit.ly/Yamaha-F...
Here, John Talley takes you through a powerhead rebuild on a 2004 Yamaha F225 from start to finish. We’ll start with the bottom end, and John will show you how to install the crankshaft and pistons. This is a complicated process, since you’ll need to take numbers from the crankshaft, crankcase, and connecting rods to get the right bearing sizes. We’ll also install pumps, hoses, and close the crankcase cover.
HEAD INSTALLATION - 37:25
With the bottom end complete, we’ll show you how to install a top end assembly on a Yamaha outboard. The heads on this unit were shot, and Yamaha offers complete assemblies for the right and left side. We’ll need to remove the cams cam chain tensioner to get this done, and then we’ll get the heads bolted onto the engine. Getting the correct torque is essential here, and John will lay out the precise specs for each bolt.
ELECTRICAL SYSTEM - 49:00
With the heads installed, we’ll turn to the electrical system. John will show you how to install a flywheel on a Yamaha F225, and then we’ll work on installing the camshaft gears and setting the timing. We’ll also install the temperature sensor, regulator rectifier, the wiring harness, and coil packs.
FUEL SYSTEM - 1:05:25
Finally, we’ll install the fuel system on the F225. John will show you how to test the fuel pump on a Yamaha outboard, and then we’ll work on reassembling our VST tank. Then, John will show you how to clean the fuel injectors on an outboard using a kit from Motion Pro.
Then, we’ll install the intakes and make several of the electrical connections as well as get the throttle linkage attached.
Our complete Yamaha 225 powerhead rebuild playlist, starting with the F225 engine teardown, can be found here: • Yamaha F225 Powerhead ...
Need a Yamaha F225 lower unit rebuild video? Right here: • Yamaha Outboard Lower ...
See the crankshaft and piston diagram for your F225: www.boats.net/...
See the crankcase diagrams:
www.boats.net/...
www.boats.net/...
See the head assembly diagram:
www.boats.net/...
F225 flywheel assembly diagram:
www.boats.net/...
F225 electrical system diagrams:
www.boats.net/...
www.boats.net/...
See the fuel injection pump diagram here:
www.boats.net/...
See the intake diagram here:
www.boats.net/...
VIDEO HIGHLIGHTS:
Getting sizes for bearings - 2:00
Installing crankshaft - 4:00
Closing crankcase - 12:00
Assembling pistons and rings - 17:25
Installing pistons - 20:00
Installing windage tray - 32:00
Removing camshafts - 38:00
Installing heads - 41:30
Installing valve covers - 47:00
Mounting camshaft gears - 49:00
Finding top dead center - 52:00
Installing timing belt - 53:00
Installing stator - 54:00
Mounting the flywheel - 55:00
Installing wiring harness - 57:00
Opening the VST tank - 1:05:55
Testing the fuel pumps - 1:06:45
Replacing needle valve - 1:17:00
Cleaning fuel injectors - 1:24:30
Reassembling throttle bodies - 1:27:00
Installing intakes and fuel rails - 1:28:00
Installing intake silencers - 1:33:20
Find Yamaha outboard parts here: www.boats.net/...
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In the video we’re working with a Yamaha F225 outboard motor, but you may have similar steps for your Yamaha outboard. If you’re not sure whether these steps apply to your motor, leave a comment and we’ll get back to you.

[@AchikSarih]

My brother, thank you very much for this distinguished and righteous work that you are presenting. Thank you very much. You have presented something that you will be shown mercy for on the Day of Resurrection with a righteous deed that will admit you to Paradise by my Lord.❤❤❤❤❤❤

[@scottyfixer452]

I have a Nissan 120 hp two-stroke outboard. The screw on fuel filter was taken off and I noticed the screen inside was installed upside down. Blocking the fuel flow coming in from the top of the fuel housing. Would that cause it not to accelerate it idle fine, but the minute you gave it gas or full throttle it fell on its face.

[@divinepeace007]

very time consuming and needs lots of patience and long time mechanical experience to do such a job without big mistakes ,,,thanks for your personal knowledge you kindly share with us,,,,

[@fz0gtg]

Very nice video! I worked in engine design and manufacturing for 40 years for several global automotive companies. It interesting how similar the assembly processes are with marine applications. My particular expertise is in sealing and fastening and again the similarities in specifications are evident with the exception of prelubing the critical fasteners before tightening. In high volume manufacturing fasteners have coatings applied for several reasons but for manufacturing the importance is with regard to keeping a consistent coefficient of friction in the joint! The slightest variation in friction has a impact on the most important aspect of fastening which is clamp load, the force that keeps things together! Just a drop of oil in a torque only tightening strategy with cause the clamp load to rise so in a critical joint where a torque + angle tightening strategy is used this could cause the final clamp load after the angle is added to be higher than expected due to the the preload being higher at the moment the angle is applied! Regarding sealing, the application of RTV/ Yamalube on the lower crankcase to block once the joint is fully tightened will be so thin that it will certainly fail within the first few thermal cycles resulting in a leak due to joint motion as RTV requires a cross section of rubber to be formed once cured as the sealing mechanism requires bonding to both surfaces and then the establishment of the rubber cross section when cured which acts like a rubber band stretching back and forth with the joint motion! Just a couple observations and suggestions to make for a more robust assembly!

[@govsux1]

Could someone explain why it’s necessary to use plasti gage if he already knows the number / color of the bearing the block calls for?

[@JustMike2791]

I so enjoy Yamaha engineering. Excellent video, thanks for taking the time to post it. Top notch!

[@jordanjones.5671]

Amazing video, but my question is wats the savings of doing this versus buying a new engine.

[@scotthenderson4376]

Loved it actually zoned it there time just got away from me. Wish I had someone like you to take my Honda 200 to for some work

[@张益达-p5e]

非常棒的实际操作视频！虽然有1个半小时，但观看过程令人愉悦

[@robertvenero4314]

Excellent job it was a pleasure watching work on that engine I learned a lot just by watching you.

[@jth1699]

It's obvious you know these engines - I prefer using a dial bore guage to determine the oil clearance... and I have never any one so frugal with assembally lube... nice job...

[@jeremyrowe4339]

Extremely detailed good job!

[@aquilesmasdmd]

I’m so mesmerized by this. Can’t stop watching. 😂 I’m not even a mechanic. Just love to learn

[@inkbydjtattat8628]

Same lmaooo

[@carltrano1325]

Ball park what does this rebuild cost?

[@andyvan5692]

think this video is a build FROM SCRATCH, NOT a re-build, as you DON'T show us how you took it apart, or how you got the block off the outboard bracket.

[@jeremiahgray1452]

Where did you get the flywheel puller? Looks really hefty!

[@pbertf24]

You are a master ! Thank you

[@kylewalker7072]

Of course today in 2024 you can't even deliver the boat parts you say you haven't stopped but you really don't

[@lb7wade518]

Can you bore these engines out and give more hp?

[@arthurperea274]

Does 1998 yamaha 90HP 2stroke with 90psi all cylinder are still good?

[@richardstrickland5597]

I have a 2004 Mercury 225. I know Yamaha made it,but is it excact ?

[@MrDrozfender]

What size socket for the flywheel nut?

[@bruceshepard1136]

I know iam tardy to the party but are the procedures the same with a 300 hpdi 2 stroke minus oil pump thanks great video

[@dpcontracting]

Do you have a video changing a crankshaft sensor on a Yamaha 225 hp. 2007

[@mchristofas]

Looks like a dream working with all new parts as opposed to engines that look like they were pulled from the ocean floor!

[@yusmanigarcia1016]

John, thank you for this videos. I just purchased all parts to do a F250. Can I use the same measurements for bearing and rod clearance?

[@ATC235]

Can I ask how much this cost. Thank

[@BnShanhAkrmSalmBnShanh]

احسنت اخي الكريم

[@fishydubsfishing6516]

What was the total cost to do that

[@scottporter7437]

Thanks from Slam Bang fishing lodge we specialize in great fishing food and good times west coast coast of Vancouver island

[@geogsi]

Thanks for the video it helped blue to remove the drive shaft bit and replace my shift cam

[@vinceschaeffer]

I live on the northwest coast of Alaska where boats are essential during the summer. would be awesome if a boat school opened up this way. some guys here are ok with them, but most of the time they just up and order a new outboard.. very good and thorough video! happy new year 👊

[@triathletechink69]

John, don't you do some Honda VTX how to videos? Man you got some serious knowledge.

[@audreytoves6916]

How is the lower lower mount rubber housing installed? PN- 663-44551-02-4D

[@knockywigglesworth1909]

Great engine until they fail. And they all prematurely fail!

[@presleyvagi-cx4ws]

Thanks for reminding me, great job.I have the same model.

[@bernievandeboogaard8364]

I have water in my lower end oil, but it isn't coming out of the bottom, that oil is the right color. It's coming out of the upper end of the lower unit, out of 5 holes.One at t he frint and 2 under ther area where the impleer is. I have a Suzuki 175DF

[@bijujoseph7080]

Please kindly explain,plastic gauge check

[@AlienPizza38]

I’m new to this boating world… But I’ve noticed that all these boat engines get really bad corrosion from have the sea water pumped through the engine for cooling… So why not have a coolant tank somewhere on the boat and use actual coolant like in a car? Or is this already a thing thats an aftermarket option?

[@joshzachman7793]

Lots of inboards use closed cooling systems. Weight isn’t as big of an issue with these, Outboard companies are always trying to reduce weight and improve efficiency, adding an entire cooling system and heat exchangers ads a lot of weight and Bulk the motor, all when you have a practically unlimited supply of cool raw water under the boat. Most outboards are capable of thousands of hours if properly maintained it simply doesn’t make sense.

[@SF-rl7hl]

Did make the outboard motor vertical stand? I can't seem to find on online?

[@OmarikSpeke]

Interested

[@Cys62]

Very good video content... meticulously executed with passion.

[@joelvale3887]

Amazing to see how many parts are needed just to turn one propeller.

[@randymoseman3698]

Did you just use a regular sharpie for marking bolt sequence etc?

[@cismaanaxmed4854]

Good job

[@eisonhurtado5761]

Como ago para calcular q tipos de casquetes nesecito hay alguna fórmula matemática?

[@johnmagruder6292]

Valve covers twice? Seems counter productive.

[@matiasduarte3657]

Gran video. Muchas gracias. 😎👍👍

[@harveyfloyd6045]

Very informative. Thanks.

[@blakelywest2961]

Which Yamabond to use on crankcase?

[@brianbailey4540]

How many times can you stretch those rod bolts?

[@ridwanedo173]

Bahasa indonesia

[@stephenbonin3049]

This guy knows his stuff.

[@sspp-n9w]

Good job sir ❤

[@rolandvalerimbadingakoumba6396]

good job

[@truongtrananh6544]

thanks sir

[@rongrey7449]

You are the best!

[@sswayyyy124]

How much would this cost ?

[@alpaslan5859]

He is a Maestro

[@pbertf24]

You are a master ! Thank you

[@sergeantmajordyi7049]

Excellent video.

[@rburkeish]

AbsouletlyI loved the video. I feel that I could rebuild the same motor Watching this video at the same time. Real nice job sir!!!

[@BoatParts]

Appreciate it!

[@Fishergamer893jr]

@@BoatParts Hi great video thanks for sharing.. any idea how much it will cost go the rebuild and any warranty.. my name is Julian i work in Boston at a boat shop and we sale around 30 used Yamaha outboards ,and another 20 for parts (the ones with low compression) thank you

[@jth1699]

It's obvious you know these engines - I prefer using a dial bore guage to determine the oil clearance... and I have never any one so frugal with assembally lube... nice job...

[@randymoseman3698]

Nice work. You can rebuild my Yamaha any time..and I am in the market for a re-do on it right now....

[@adobedoug2564]

Installing the valve covers, then removing them in the next step is a bone head move.

[@MenCanNotBeWomen]

should be chain driven for timing belts.

[@MenCanNotBeWomen]

Audio is out of sync of the video...

[@probeach1695]

greetings from Bobcaygeon Ontario Canada